Silan
Semiconductors
LSB
Address D2H G0 G1
SC9256
MSB
G0 G1 GATE TIME
00
10
01
11
1ms
4ms
16ms
64ms
CYCLE MEASUREMENT
PULSE
50 KHz
150 KHz
900 KHz
Crystal oscillator frequency
(2) Bits SC,IF1 and IF2 …I/O port and general-purpose counter switching bits.
(*) The functions of the following pins are switched by data.
LSB
MSB
Address D2H
IF1 IF2
IF1
I/O-5/IFIN1
1
IFIN1
0
I/O-5
IF2 I/O-6/IFIN2
1
IFIN2
0
I/O-6
(3) Bits M5 sets the state for pin I/O-5/IFIN1; M6, for pin I/O-6/IFIN2.
These operations are valid when bits SC, IF1 and IF2 are all set to 1.
LSB
MSB
Address D2H
M5 M6
M5 M6
0
0
(*)
1
1
0
0
0
PIN STATES (When bits sc, IF1 and IF2 are all set to "1")
IFIN1
IFIN2
INPUT pulled down
INPUT pulled down
INPUT enabled
INPUT enabled
INPUT pulled down
INPUT pulled down
Note: Bits marked with an asterisk “(*)” are don’t care
(4) Bits f0~f9…The general-purpose counter results can be read in binary from bits f0~f9 of the output register
(D1H).
LSB
MSB
Address D1H
f0 f1 f2 f3 f4 f5 f6 f7 f8 f9 f10 f11 f12 f13 f14 f15 f16 f17 f18 f19 OVER BUSY "0" "0"
20
219
General-purpose counter data
(5) OVER and BUSY bits…Detect the operating state of the general-purpose counter.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
REV: 1.0
12
2002.01.30.